From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Dmesg: Use a PAE enabled kernel
Date: 3 Mar 2003 19:22:25 -0800 [thread overview]
Message-ID: <b4165h$f0f$1@cesium.transmeta.com> (raw)
In-Reply-To: 3E6381B9.4090708@walrond.org
Followup to: <3E6381B9.4090708@walrond.org>
By author: Andrew Walrond <andrew@walrond.org>
In newsgroup: linux.dev.kernel
>
> The dump looks like this:
>
> BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
> BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 00000000bfffa000 (usable)
> BIOS-e820: 00000000bfffa000 - 00000000bffff000 (ACPI data)
> BIOS-e820: 00000000bffff000 - 00000000c0000000 (ACPI NVS)
> BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
> BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
> BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
> BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This memory lives above the 4GB mark.
> Warning only 4GB will be used.
> Use a PAE enabled kernel.
> 3200MB HIGHMEM available.
> 896MB LOWMEM available.
>
> So you are saying that not all the 4Gb of ram will get mapped/used
> (specifically, everything not marked 'usable') ?
Basically, your motherboard only allows 3 GB below the 4 GB boundary;
the rest ends up above.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
Architectures needed: cris ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64
next prev parent reply other threads:[~2003-03-04 3:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-03 15:23 Dmesg: Use a PAE enabled kernel Andrew Walrond
2003-03-03 16:08 ` Martin J. Bligh
2003-03-03 16:24 ` Andrew Walrond
2003-03-03 16:33 ` Andrew Walrond
2003-03-03 17:42 ` Martin J. Bligh
2003-03-03 17:46 ` Alan Cox
2003-03-03 16:49 ` Andrew Walrond
2003-03-03 19:22 ` Alan Cox
2003-03-12 21:05 ` [PATCH] " Roland Dreier
2003-03-04 3:22 ` H. Peter Anvin [this message]
2003-03-03 16:54 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2003-03-03 16:38 Andrew Walrond
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